my cobra ran 3 codes P0136 (o2 sensor circuit malfunction bank 1 sensor 2) P0141 (o2 sensor heater circuit malfunction bank 1 sensor 2) and P0430 (catalyst efficiency below threshold bank 2)

i have 2 o2 sensors which 2 should i replace. i know i have 4 2 on each side one in front and one in back of the cats so which 2 should i replace i wana do it tonight

 

ok its going to be bank 1 sensor 2, so the bank with cylinder 1 on that side is bank 1, sensor 2 is your post cat sensor (after cat),

 

If it says catalyst efficiency, it must be one of the aft ones as it compares gases to the fore sensor. Bank 1 was drivers side, as I recall on my '02. I think both are the same, so purchase one and install it on the drivers side then clear codes. Take a nice drive though the twisties. The better quality sensors require 10 mile trip through tight corners to give a proper code reading. Check the codes again to confirm as you may have to switch sides.

Jazzer

Jazzer

 

a 10 mile trip is a pretty good test but it doesnt take that long for the sensors to start reading, as soon as you start the care the heater circuit engages and they begin to warm up, once warm they begin reading, so yes a 10 mile trip will be a good average trip to see if codes come back

 

^ (shhhhhh..... trying to get him to take that little road trip and tip-toe through the twisties )

The Kitty

 

haha thanks jazzer .. i took a look at them last night and they look easy enough im gona have to wait til teusday to do them though, going to the mets game now and school starts tomorrow